body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('bridge_game.jpg') no-repeat center center/cover;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.header-content {
    max-width: 800px;
}

main {
    background-color: white;
    padding: 20px;
    margin: 0 auto;
    max-width: 800px;
    flex: 1;
}

.content-row {
    display: flex;
    justify-content: center;
}

.content-column {
    flex: 1;
    padding: 0 10px;
}

.content-column h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.content-column p {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

#pay-button {
    display: block;
    width: 100%;
    padding: 0.5rem;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
}

#pay-button:hover {
    background-color: #45a049;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
    margin-top: auto;
}